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Wood Fillers for Windows

A range of window fillers for filling gaps, cracks and holes in wooden window frames and sills in preparation for refinishing with an interior wood oil, stain or other suitable wood finish. These strong and effective wood fillers will suit any project, whether softwood or hardwood window sills, new or old wooden window frames.

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Displaying 21 products

  4.9/5.0  (60)
The strongest two-part wood filler we know. Available in many wood shades.
  • 15 mins drying time
More info
Available in 30ml, 750ml
  5.0/5.0  (61)
A strong, fast drying two-part wood filler that can be stained.
  • 30 mins drying time
More info
Available in 275g, 550g, 1kg
Quick spot repairs to your window frame - just scrape and fill with these wax filler sticks.
  • 2 mins drying time
More info
Available in 40g
  4.5/5.0  (27)
Soaks deep in to rotten timber to strengthen and reinforce softened wood.
  • 1 coat
  • 2 hrs drying time
More info
Available in 250ml, 500ml
  5.0/5.0  (3)
For repairing finished interior wooden furniture. Fills small to medium holes, cracks and scratches. Quick drying and easy to use.
More info
Available in 50g
  4.3/5.0  (7)
Ideal for small repairs. Suitable for interior and exterior use.
  • 2 hrs drying time
More info
Available in 250g, 465g, 930g
  3.9/5.0  (4)
A water-based, multi-purpose wood filler for interior and exterior use.
  • 2 hrs drying time
More info
Available in 125ml
  5.0/5.0  (5)
A high performance, 2 part wood filler for repairing damage caused by wet rot and for major joinery repairs.
More info
Available in 250g, 500g, 750g
A tough, durable, flexible wood filler for small repairs. Suitable for interior and exterior use.
  • 2 hrs drying time
More info
Available in 250ml, 310ml, 500ml
  4.7/5.0  (3)
A rapid drying wood hardener for repairing decayed wood and all major joinery repairs. Provides a firm base for filling with Cuprinol Ultra Tough Wood Filler.
  • 2-3 coats
  • 2 hrs drying time
More info
Available in 500ml
A 2-in-1 flexible filler for emergency and permanent repairs on small areas of interior and exterior wood
  • 1 coat
  • 4 hrs drying time
More info
Available in 180ml
  4.7/5.0  (5)
A high strength, two pack wood filler ideal for filling larger areas. Rapid curing and superb adhesion.
  • 30 mins drying time
More info
Available in 350ml
A quick drying flexible filler for emergency and permanent repairs on small to medium areas of interior and exterior wood
  • 1 coat
  • 4 hrs drying time
More info
Available in 400ml
A multipurpose UV and moisture resistant glazing sealant for interior and exterior windows. Durable, flexible and does not shrink
  • 1 coat
  • 2 hrs drying time
More info
Available in 290ml
A 2-part, flexible filler for emergency and permanent repairs on large areas of interior and exterior wood
  • 1 coat
  • 16 hrs drying time
More info
Available in 400ml
A very fast drying flexible filler for quick emergency and permanent repairs on small areas of interior and exterior wood
  • 1 coat
  • 1 hr drying time
More info
Available in 300ml
An introductory starter kit containing everything needed for repairing timber windows, doors, furniture and more
A 2-in-1 fast drying, flexible filler for quick emergency and permanent repairs on small areas of interior and exterior wood
  • 1 coat
  • 1 hr drying time
More info
Available in 180ml
A very fast drying epoxy filler for fine spot repairs on interior and exterior wood, such as cracks and screw holes
  • 1 coat
  • 30 mins drying time
More info
Available in 180ml
A 2-part repair resin for most types of interior and exterior wood. Ideal for use in cold weather
  • 1 coat
  • 15 hrs drying time
More info
Available in 400ml
A universal repair paste for all types of wood repairs. Year round use on interior and exterior windows, doors and more.
  • 1 coat
  • 12 hrs drying time
More info
Available in 400ml